命令作用样例解释-mkdir创建目录hadoop fs -mkdir sanguo-moveFromLocal剪切hadoop fs -moveFromLocal shuguo.txt /sanguo将本地文件剪切到hdfs-copyFromLocal拷贝hadoop fs -copyFromLocal weiguo.txt /sanguo将本地文件拷贝到hdfs-put拷贝hadoop fs -put wuguo.txt /sanguo和copyFromLocal 一样-appendToFile追加hadoop fs -appendToFile liubei.txt /sanguo/shuguo.txt追加一个文件到已存在文件末尾-copyToLocal下载hadoop fs -copyToLocal /sanguo/shuguo.txt hadoop fs -copyToLocal /sanguo/shuguo.txt shuguo222.txt将hdfs文件下载到本地，可以指定目录以及文件名称-get下载hadoop fs -get /sanguo/shuguo.txt和copyToLocal一样-ls查看目录hadoop fs -ls /sanguo-count查看目录hadoop fs -count /sanguo统计hdfs对应路径下的目录个数，文件个数，文件总计大小-cat查看文件内容hadoop fs -cat /sanguo/shuguo.txt-tail查看hadoop fs -tail /sanguo/shuguo.txt查看文件末尾1kb数据-chmod修改权限hadoop fs -chmod 777 /sanguo/shuguo.txt该命令用法和Linux一样-chown修改文件拥有者hadoop fs -chown demo:demo /sanguo/shuguo.txt该命令用法和Linux一样-chgrp修改文件所属组hadoop fs -chgrp root /sanguo/shuguo.txt该命令用法和Linux一样-cp拷贝hadoop fs -cp /sanguo/shuguo.txt /demo将hdfs上的文件拷贝到另一个目录-mv拷贝hadoop fs -mv /sanguo/shuguo.txt /demo将hdfs上的文件剪切到另一个目录-rm删除hadoop fs -rm /sanguo/shuguo.txt-du查看文件大小hadoop fs -du /sanguo-setrep设置副本数量hadoop fs -setrep 2 /sanguo/shuguo.txt副本数量不能超过集群数量
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